i don't know if it happened right after the itunes update or not (nor do i know why this would happen) but i noticed it after that on my ichat - my isight on my macbook wont work. i go to the audio tab at the top of the screen when ichat is open and "camera enabled" is checked, but greyed out so you can't click on it. audio chat still works. i tried to open photobooth but it says the camera isn't attached or is in use by another application. it isn't in use, the green light isn't on and i have nothing open that uses isight. i restarted, and nothing. PLEASE HELP, i've had so many problems with this computer in the past 5 months i've had it. dealing with this crap has been a nightmare.